hygiene: Phase 2 — DragonX-authored cleanup (13 findings)

Second phase of the code-hygiene remediation, covering the items the
DragonX team introduced or the rebrand missed. No consensus behavior
changes; validated on a local self-mining node.

Log cruft:
- chainparams: route the startup ">>>>>>>>>>" banner and the port line
  through LogPrintf/LogPrint("net") instead of fprintf(stderr).
- pow: drop the fprintf(stderr) hash-mismatch dump that duplicated the
  LogPrintf copy verbatim.
- miner: gate the RandomXDatasetManager per-alloc/per-VM address dumps and
  MemDiag /proc reads behind LogPrint("randomx"); keep a one-line
  "allocated shared dataset (N GB)" summary at default verbosity.

Named constants (single source of truth in wallet.h):
- DEFAULT_AUTOSHIELD_FEE/INTERVAL, MIN_AUTOSHIELD_INTERVAL,
  DEFAULT_AUTOSHIELD_MIN_UTXOS, AUTOSHIELD_MIN/MAX_FEE for the autoshield
  option parsing and help text (were bare 10000/25/5 literals repeated
  across init.cpp and wallet.h).
- AUTO_OP_TARGET_HEIGHT_OFFSET replaces the three copy-pasted
  `blockHeight + 5` async-op scheduling offsets.
- AUTO_OP_EXPIRY_DELTA replaces the three per-file *_EXPIRY_DELTA=15
  constants (sweep/consolidation/autoshield) with one shared value.
- Move DEFAULT_AUTOSHIELD_FEE out of the op header into wallet.h so it no
  longer collides when both headers are included.

Error surfacing:
- init: report clamped/out-of-range -autoshieldinterval/-autoshieldfee via
  InitWarning() (surfaces to GUI/log) instead of fprintf(stderr).

Rebrand / dead foreign-chain code (approved removals):
- server: drop the HUSH3 special-cases in stop() and HelpExampleCli; the
  cli example now shows "dragonx-cli" instead of "hush-cli".
- getinfo (misc): remove the stale dPoW notarization block (notarized,
  prevMoMheight, notarizedhash, notarizedtxid, notarizedtxid_height,
  HUSHnotarized_height, notarized_confirms) — DragonX is a private chain
  from genesis with no active dPoW. Also fixes the hardcoded "HUSH3" that
  made getinfo query a foreign chain's notarization.
- delete the dead Komodo notary RPCs getera/getdragonjson/
  getnotarysendmany/geterablockheights (getera returned 0;
  getnotarysendmany was marked "this is broke") and their registrations.
- remove the dead ASSETCHAINS_EQUIHASH reporting branches in getinfo and
  getmininginfo — DragonX is RandomX-only.

chainparams: document why the upstream Equihash params and the literal
Bitcoin genesis are retained under RandomX (do not "fix" them).

Deferred: the hdSeedOrigin int->string switch in z_autoshieldstatus
(no shared helper exists to reuse; low value).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/rpc/server.cpp

@@ -276,11 +276,7 @@ UniValue stop(const UniValue& params, bool fHelp, const CPubKey& mypk)
     // Shutdown will take long enough that the response should get back
     StartShutdown();
 
-    if ((strncmp(SMART_CHAIN_SYMBOL, "HUSH3", 5) == 0) ) {
-        sprintf(buf,"Hush server stopping, for now...");
-	} else {
-        sprintf(buf,"%s server stopping...",SMART_CHAIN_SYMBOL);
-	}
+    sprintf(buf,"%s server stopping...",SMART_CHAIN_SYMBOL);
     return buf;
 }
 
@@ -292,9 +288,6 @@ static const CRPCCommand vRPCCommands[] =
   //  --------------------- ------------------------  -----------------------  ----------
     /* Overall control/query calls */
     { "control",            "help",                   &help,                   true  },
-    { "control",            "getdragonjson",          &getdragonjson,          true  },
-    { "control",            "getnotarysendmany",      &getnotarysendmany,      true  },
-    { "control",            "geterablockheights",     &geterablockheights,     true  },
     { "control",            "stop",                   &stop,                   true  },
 
     /* P2P networking */
@@ -666,7 +659,6 @@ UniValue CRPCTable::execute(const std::string &strMethod, const UniValue &params
             // while a very long wallet rescan is happening and do other read-only devopz
             if (pcmd->name != "stop" && pcmd->name != "help" && pcmd->name != "z_listaddresses" && pcmd->name != "z_exportkey" &&
                 pcmd->name != "getNotarizationsForBlock" && pcmd->name != "scanNotarizationsDB" &&
-                pcmd->name != "getnotarysendmany" && pcmd->name != "geterablockheights" &&
                 pcmd->name != "getaddressesbyaccount" && pcmd->name != "listaddresses" && pcmd->name != "z_exportwallet" &&
                 pcmd->name != "notaries" && pcmd->name != "signmessage" && pcmd->name != "decoderawtransaction" &&
                 pcmd->name != "dumpprivkey" && pcmd->name != "getpeerinfo" && pcmd->name != "getnetworkinfo" &&
@@ -695,11 +687,7 @@ UniValue CRPCTable::execute(const std::string &strMethod, const UniValue &params
 
 std::string HelpExampleCli(const std::string& methodname, const std::string& args)
 {
-    if ((strncmp(SMART_CHAIN_SYMBOL, "HUSH3", 5) == 0) ) {
-        return "> hush-cli " + methodname + " " + args + "\n";
-    } else {
-        return "> hush-cli -ac_name=" + strprintf("%s", SMART_CHAIN_SYMBOL) + " " + methodname + " " + args + "\n";
-    }
+    return "> dragonx-cli " + methodname + " " + args + "\n";
 }
 
 std::string HelpExampleRpc(const std::string& methodname, const std::string& args)